.clock {
  width: 400px;
  height: 180px;
  line-height: 180px;
  border: 10px solid #aaa;
  border-radius: 10px;
  margin: 120px auto;
  background: pink;
  text-align: center;
  position: relative;
  box-shadow: 0px 5px 20px rgba(0,0,0,.6);
}
.clock .text {
  font-size: 70px;
  font-weight: bold;
  color: rgba(0,0,0,.7);
}
.clock .btn {
  position: absolute;
  /*top: -66px;*/
  bottom: -66px;
  border: none;
  outline: none;
  width: 80px;
  height: 36px;
  border-radius: 4px;
  font-size: 16px;
  background: #aaa;
  cursor: pointer;
  box-shadow: 0px 5px 20px rgba(0,0,0,.6);
}
.clock .btn:hover {
  opacity: 0.8;
}
.clock .btn-clock {
  left: 110px;
}
.clock .btn-clock.to-left {
  left: 60px;
}
.clock .btn-timer {
  right: 110px;
}
.clock .btn-suspend {
  right: 160px;
}
.clock .btn-reset {
  right: 60px;
}